Machine for grinding spiders



(No Model.) 0 Q A. WASHBURN 81; A. P. MERRITT. MACHINE FOR GRINDING SPIDERS.

No. 244,010. Patented July 5, 1881.

WITNESSES 5L, 'VVMM INVENTOR a Q W N. PETERS. Photobmc n hcr. Walhinglol D. c.

UNITED STATES PATENT OFFICE.

ALVAH WASHBURN AND ASA P. MERRITT, OF MEDINA, OHIO.

MACHINE FOR GRINDING SPIDERS.

SPEGIFIGATION forming part of Letters Patent No. 244,010, dated July 5, 1881.

Application filed October 7, 1880. (No model.)

To all whom t't may concern Be it known that we, ALVAH WASHBURN and ASA P. MERRITT, of Medina, in the county of Medina and State of Ohio, have invented certain new and useful Improvements in Machines for Grinding Spiders, &c.; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use it, reference being had to the accompanying drawings, which form part of this specification.

Our invention relates to a machine for grinding spiders, griddles, and the like; and it con- I 5 sists in certain features of construction and combinations of parts, as will hereinafter be described, and pointed out in the claim.

In the drawings, Figure 1 is an isometric view of our device. Fig. 2 is a detached view,

showing the spider and emery-wheel shafts, with the spider and emerywheel attached, illustrating their operation.

A represents any suitable frame-work or system of standards for carrying the working parts of our machine.

B is the main driving-shaft, to which initial power is applied in any suitable manner.

Upon the shaft B are placed two drivingpulleys, O 0. Instead, however, of the pulleys 0, any suitable gear-connection, if desired, may be substituted.

D is the spider-shaft, having the ordinary groove-and-fcather connection with its pulley D, by which it is revolved. The feather-andgroove connection between the pulley D and the shaft D permits of a longitudinal movement of the shaft through the pulley during revolution. This is a very common expedient in mechanics, and need not be particularly specified. It is sufficient to state that this feather-and-groove connection between the pulley and shaft is the same in the grinding or polishing shaft about to be specified as has already been described for the shaft and pul- 5 ley D D.

E is a feeding-handle, and by its manipulation the shaft D is given a longitudinal movement through its bearings upon the frame A.

We do not limit ourselves to any special construction of the manipulating-handle E, or to any method of connecting it with the shaft D. There are many other familiar methods of connecting these parts, and any method may be adopted that will permit of the free revolution of the shaft, while at the same time such connection should be had between shaft and handle that a longitudinal motion can be given the shaft through its bearings. All that has been specified in relation to this handle and shaft applies to the handle E and shaft F of the grinder or polisher F. The shaft F of the grinder or polisher F is driven by a beltconnection between the pulleys O and G It will be observed that the grinder F has two faces at an angle to each other, the face f 6 5 being used for polishing the inside bottom of the spider and the face g for grinding the inside of its rim. The spider S is held in its position upon the mandrel D by any suitable cupshaped holder, S, or otherwise.

The operation of our device is as follows: The spider S is placed in its holder S upon the shaft D. The shafts D and F are then brought together until the grinding-face) of the grinder F impinges against the center of the spider. Meanwhile both the spider and the grinder F are rotated, the grinder, of course, being revolved the faster. As the parts just named revolve the handles E E are moved, so that the grinder is made to travel along the bottom of the spider from its center outward toward the rim, as indicated by the dotted lines in Fig. 2 of the drawings. When it reaches the rim of the spider the face 9 of the grinder will come into operation, as indicated in the dotted lines, to grind or polish the inside of the spiders rim. It will be seen that a single movement suffices to grind the entire interior of the spider, that motion being from the center of the spider outward.

We are aware that polishing and grinding machines have been provided with an adjustable work-holder and an adjustable revolving. grinding or polishing wheel; and, further, we are aware that polishing-machines have been 5 furnished withtwo adj ustablepolishing wheels; and hence we would have it understood that we make no claim to such arrangement and construction of parts.

What we claim is- In a machine for grinding spiders, &c., the combination, with two rotary shafts, located end to end and at an angle to each other, and In testimony whereof we have signed our mechanism adapted to move one or both of the names to this specification in the presence of shafts to and from each other, of a holder setwo subscribing witesses. cured to the opposing end of one shaft and a 5 grinder secured to the opposing end of the ix other sh aft, said grinder being formed with one inclined face for Working against the bottom Witnesses: of the spider or analogous article and another FRANK O. WILCQX, inclined face for working against the rim, sub- G. WV. LEWIS.

1o stantially as set forth. 

